<template>
  <div class="permission-container">
    <div class="app-container">
      <!-- 表格 -->
      <el-card>
        <div style="text-align: right; margin-bottom: 20px">
          <el-button type="primary" size="small" @click="hAdd(1, '0')"
            >添加权限</el-button
          >
        </div>
        <el-table border :data="list" row-key="id">
          <el-table-column label="名称" prop="name" />
          <el-table-column label="标识" prop="code" />
          <el-table-column label="描述" prop="description" />
          <el-table-column label="操作">
            <template slot-scope="scope">
              <el-button
                type="text"
                v-if="scope.row.type === 1"
                @click="hAdd(2, scope.row.id)"
                >添加</el-button
              >
              <el-button type="text" @click="hEdit(scope.row.id)"
                >编辑</el-button
              >
              <el-button type="text" @click="hDel(scope.row.id)"
                >删除</el-button
              >
            </template>
          </el-table-column>
        </el-table>
      </el-card>
    </div>
    <el-dialog
      :visible.sync="showDialog"
      :title="isEdit ? '编辑' : '添加'"
      @close="resetForm"
    >
      <!-- 表单内容 -->
      <el-form
        label-width="100px"
        ref="formData"
        :model="formData"
        :rules="rules"
      >
        <el-form-item label="权限名称" prop="name">
          <el-input v-model="formData.name" />
        </el-form-item>
        <el-form-item label="权限标识" prop="code">
          <el-input v-model="formData.code" />
        </el-form-item>
        <el-form-item label="权限描述" prop="description">
          <el-input v-model="formData.description" />
        </el-form-item>
        <el-form-item label="权限启用">
          <el-switch
            v-model="formData.enVisible"
            active-text="启用"
            active-value="1"
            inactive-text="不启用"
            inactive-value="0"
          />
        </el-form-item>
      </el-form>

      <template #footer>
        <div style="text-align: right">
          <el-button @click="showDialog = false">取消</el-button>
          <el-button type="primary" @click="hSubmit">确定</el-button>
        </div>
      </template>
    </el-dialog>
  </div>
</template>

<script>
import {
  getPermissionList,
  addPermission,
  delPermission,
  updatePermission,
  getPermissionDetail,
} from "@/api/permission";
import { tranListToTreeData } from "@/utils/index";

export default {
  name: "Permission",
  data() {
    const validCode = (rule, value, callback) => {
      // 添加时的校验：code不能重复
      let existCodeList = this.originList;
      if (this.isEdit) {
        // 编辑时的校验: code能取自己
        existCodeList = this.originList.filter(
          (item) => item.id !== this.formData.id
        );
      }
      existCodeList.map((it) => it.code).includes(value)
        ? callback(new Error(value + "已经占用"))
        : callback();
    };

    const validName = (rule, value, callback) => {
      // 添加时的校验： 名字不能取子元素的名字
      let existNameList = this.originList.filter(
        (item) => item.pid === this.formData.pid
      );
      if (this.isEdit) {
        // 编辑时的校验： 名字不能取兄弟（排除自己）的名字
        // 找兄弟，排除自己
        existNameList = this.originList.filter(
          (item) =>
            item.pid === this.formData.pid && item.id !== this.formData.id
        );
      }
      existNameList.map((it) => it.name).includes(value)
        ? callback(new Error(value + "已经占用"))
        : callback();
    };
    return {
      originList: [], // 在做校验时需要用到的数据
      list: [],
      isEdit: false,
      showDialog: false, // 是否显示弹层
      formData: {
        name: "", // 名称
        code: "", // 权限标识
        description: "", // 描述
        enVisible: "0", // 开启
        pid: "", // 添加到哪个节点下
        type: "", // 类型
      },
      rules: {
        name: [
          { required: true, message: "权限名称不能为空", trigger: "blur" },
          { validator: validCode, trigger: "blur" },
        ],
        code: [
          { required: true, message: "权限标识不能为空", trigger: "blur" },
          { validator: validCode, trigger: "blur" },
        ],
        description: [
          { required: true, message: "权限描述不能为空", trigger: "blur" },
        ],
      },
    };
  },
  created() {
    this.loadPermissionList();
  },
  methods: {
    async doEdit() {
      try {
        const res = await updatePermission(this.formData);
        console.log(res);

        this.showDialog = false;
        this.loadPermissionList();
        this.$message.success("修改成功");
      } catch (err) {
        console.log(err);
        this.$message.error("修改失败");
      }
    },
    // 用户点击了编辑
    async hEdit(id) {
      this.isEdit = true;
      // alert(id)
      // 1. 根据id去获取详情
      const res = await getPermissionDetail(id);
      console.log("从后端返回的权限点详情数据是", res);
      // 2. 填充在表单中
      this.formData = res.data;
      // 3. 显示弹层
      this.showDialog = true;
    },
    // 点击删除发请求
    async doDel(id) {
      try {
        const res = await delPermission(id);
        console.log(res);

        this.loadPermissionList();
        this.$message.success("删除成功");
      } catch (err) {
        console.log(err);
        this.$message.error("删除失败");
      }
    },
    // 用户点击删除
    hDel(id) {
      // alert(id)
      this.$confirm("你确定要删除吗？")
        .then(() => {
          this.doDel(id);
        })
        .catch(() => {});
    },
    // 当弹层关闭时，重置表单
    resetForm() {
      // 1. 强制重置表单内容
      this.formData = {
        name: "", // 名称
        code: "", // 权限标识
        description: "", // 描述
        enVisible: "0", // 开启
        pid: "", // 添加到哪个节点下
        type: "", // 类型
      };
      // 2. 清空校验
      this.$refs.formData.resetFields();
    },
    hSubmit() {
      this.$refs.formData.validate((valid) => {
        if (valid) {
          this.isEdit ? this.doEdit() : this.doAdd();
        }
      });
    },
    hAdd(type, id) {
      this.showDialog = true;
      this.isEdit = false;
      // 记录当前添加的关键信息
      this.formData.type = type;
      this.formData.pid = id;
    },
    async doAdd() {
      try {
        const res = await addPermission(this.formData);
        console.log(res);

        this.showDialog = false;
        this.loadPermissionList();
        this.$message.success("添加成功");
      } catch (err) {
        console.log(err);
        this.$message.error("添加失败");
      }
    },
    async loadPermissionList() {
      try {
        const res = await getPermissionList();
        console.log("获取权限数据", res);
        this.originList = res.data.map(({ id, pid, name, code }) => ({
          id,
          pid,
          name: name.trim(),
          code,
        }));
        this.list = tranListToTreeData(res.data);
      } catch (err) {
        console.log(err);
      }
    },
  },
};
</script>